Get prepared for your head to roll when Battlefield 3 drops. Today we get a look at the first trailer in a new series of trailers titled Operation Guillotine. The teaser trailer decapitates your mind by offering a glimpse of what the next trailer will chop off or explode. This operation sheds some light on what the new Frostbite Engine can do in the darkness. Today marks the first time the engine has shown any action at night, and it's a dark-view worth checking out. Here's the latest trailer.